I have read through a lot of the peoples' posts regarding a yellow triangle with an exclamation point.  My problem is that I recently had to use a recovery disk on my Dell computer.  I had to re-download all my programs which is a huge mess as it is.  I downloaded Windows Essentials once again.  After doing this, I tried to open a couple of my Moviemaker projects.  Each time I do there are the triangles and exclamation point on ALL of my pictures and videos.  The problem is that each of my DVD's have as many as 450 pictures and/or videos.  The captions are still at the bottom but the pictures are gone.  When I click on the picture it says that the picture can't be found and takes me to my picture files.  To go through each of the 450 and do that...I will probably just have to start over.  I have spent hours on these DVD's.  HELP!